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AssigneeIllinois Tool Works Inc.
InventorsVarce E. Howe, David R. Huff
Life of this patent
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Abstract
An atomizing apparatus comprises an electrode, an orifice through which coating material to be atomized is discharged, and a power supply for maintaining across the electrode and an article to be coated by coating material dispensed from the apparatus a potential for transferring electrical charge to the material to be atomized to cause the material to be attracted toward the article. The apparatus has a first surface providing a locus for electrical discharge when the potential is maintained on the electrode. At least one first resistance has first and second terminals adjacent the first surface and the electrode, tending to localize the discharge at the first surface to the first terminal.
Claims23
An atomizing apparatus comprising a rotator having a conductive output shaft, an atomizer for mounting on the output shaft, the atomizer including an electrode coupled to the output shaft when the atomizer is mounted on the output shaft for transferring charge from the output shaft to coating material to be atomized by the apparatus, an orifice through which coating material to be atomized is discharged so that the coating material flows across the electrode and is charged, a power supply for maintaining across the electrode and an article to be coated by the atomized coating material a potential for transferring charge to the coating material to cause the coating material to be attracted toward the article, the atomizer having a first, concave, somewhat cup-shaped surface, and at least one first resistance, each first resistance having a first terminal adjacent the first surface and a second terminal adjacent at least one of the output shaft and the electrode.
A coating material atomizing gun comprising an electrode, an orifice through which coating material to be atomized is discharged past the electrode so that the coating material is charged, a power supply for maintaining across the electrode and an article to be coated by the atomized coating material a potential for transferring charge to the coating material to cause the coating material to be attracted toward the article, a somewhat cylindrical, outer first surface, a second, front surface in which the electrode and the orifice are provided, the second surface being axially forward and radially inward from the first surface, and at least one first resistance, each first resistance including a first terminal at the first surface and a second terminal at the second surface.
An atomizing apparatus comprising a rotator having a conductive output shaft, an atomizer for mounting on the output shaft, the atomizer including an electrode coupled to the output shaft when the atomizer is mounted on the output shaft for transferring charge from the output shaft to coating material to be atomized by the apparatus, an orifice through which coating material to be atomized is discharged so that the coating material flows across the electrode and is charged, a power supply for maintaining across the electrode and an article to be coated by the atomized coating material a potential for transferring charge to the coating material to be attracted toward the article, the atomizer having a first, concave, somewhat cup-shaped surface adjacent the electrode across which the coating material flows, the first surface including a discharge edge from which the electrically charged coating material is atomized and discharged, a nut for mounting the atomizer on the output shaft, the nut having a first side substantially enclosing the first surface and the electrode except for the discharge edge of the first surface when the nut is in position on the shaft retaining the atomizer thereon and a second side generally opposite the first side, and at least one first resistance, each first resistance having a first terminal adjacent the second side and a second terminal adjacent at least one of the output shaft and the electrode.
Dependencies are inferred from the claim text.